Projecting the image of the Sun through a refracting telescope on to a screen in order to study sunspots. From Rosa Ursina by Christoph Scheiner (Bracciano,1630). Engraving | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / UIG / Universal History Archive |
Bildgröße: | 2895 px × 3028 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |